The Purpose Driven craze is just works-based churchianity mixed with pop culture. So sad to see it invading even the liturgical churches. I have been reading "Christless Christianity: The Alternative Gospel of the American Church" by Michael Horton. I highly recommend that book to anyone who is not a liberal but yet is uneasy with a lot of things going on in so-called conservatives churches nowadays.
As a Catholic I felt that it’s great, I don’t have to worry about any of that drek but I do, really, because it is no fun at all watching my Protestant compatriots getting sucked into these things. It affects the whole country adversely. And, we had problems of a similar sort in the 70s-90s with the “modernizing” of the Catholic Church. Thankfully that is going away bit by bit.